I haven't tried WebLogic, but I assume the procedure is the same as for Tomcat.
When developing an application that used CXF, I simply included the necessary CXF librarires in the WEB-INF/lib folder for the project.
This includes CXF on an "per application" basis. If you want to make CXF libraries available to all applications in the server, then you need to locate the server library folder and copy the CXF libraries into it.
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